Motorcycle engine

Details Motorcycle engine Motorcycle engine

2006-10-20

2009-08-04

McMahon, M. (Department: 3741)

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder head

Reexamination Certificate

active

07568463

ABSTRACT:
A motorcycle having: (i) a V-type two-cylinder engine having a front cylinder and a rear cylinder, each cylinder having a head with a right side exhaust port and external cooling fins; (ii) a right side muffler and a left side muffler; and (iii) a front header running from the exhaust port of the front cylinder head to the right side muffler and a rear header running from the exhaust port of the rear cylinder head to both the right side muffler and the left side muffler; is modified by removing the rear cylinder head and replacing it with a new rear cylinder head having a left side exhaust port and by removing the rear header and replacing it with a new rear header running only to the left side muffler such that all the exhaust gases from the front cylinder flow through the right side muffler and all the exhaust gases from the rear cylinder flow through the left side muffler.

REFERENCES:
patent: 6026930 (2000-02-01), Ogisu et al.
patent: 7374016 (2008-05-01), Yamaguchi et al.
patent: 2003/0079938 (2003-05-01), Yamaguchi

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